Method of making door frames

Abstract

The method of making a plurality of door frames from a single slab of metallic sheet material. The largest size door frame is first produced from a slab of material separating such from this slab of material. Then producing a second size of door frame from the remaining section of the slab of material where the second size is of a smaller configuration than the first size. Both door frames are each a single integral unit. There may be produced a third size of door frame from the remaining slab of material and possibly even a fourth size.

What is claimed is: 
     
       1. A method of making door frames comprising: providing a slab of metallic sheet material;   producing a first door frame of a first size from said slab where said first door frame is a single integral unit;   producing a second door frame of a second size from said slab where said second door frame is a single integral unit and where said second size is smaller than said first size.   
     
     
       2. The method as defined in claim 1, further comprising: producing a third door frame of a third size from said slab where said third door frame is a single integral unit and where said third size is smaller than said second size.   
     
     
       3. A method of making border structural members, each border structural member enclosing an open area, said method comprising: providing a slab of metallic sheet material;   producing a first structural member of a first size from said slab where said first structural member is a single integral unit;   producing a second structural member of a second size from said slab where said second structural member is a single integral unit and where said second size is smaller than said first size.   
     
     
       4. The method as defined in claim 3, further comprising: producing a structural member of a third size from said slab where said third structural member is a single integral unit and where said third size is smaller than said second size.   
     
     
       5. A method of making door frames comprising: providing a slab of rigid sheet material which has a first free peripheral edge;   forming a first door frame of a first size from said slab at said first peripheral edge;   severing said first door frame from said slab to achieve a single integral unit for said first door frame while leaving a first remnant slab with a second free peripheral edge;   forming a door frame of a second size from said first remnant slab at said second free peripheral edge; and   severing said second door frame from said first remnant slab to achieve a single integral unit for said second door frame while leaving a second remnant slab with a third free peripheral edge.   
     
     
       6. The method as defined in claim 5, further comprising: forming a third door frame of a third size from said second remnant slab at said third free peripheral edge; and   severing said third door frame from said second remnant slab to achieve a single integral unit for said third door frame.   
     
     
       7. A method of making border structural members, each border structural member enclosing an open area, said method comprising: providing a slab of rigid sheet material which has a first free peripheral edge;   forming a first structural member of a first size from said slab at said first peripheral edge;   severing said first structural member from said slab to achieve a single integral unit for said first structural member while leaving a first remnant slab with a second free peripheral edge;   forming a second structural member of a second size from said first remnant slab at said second free peripheral edge; and   severing said second structural member from said first remnant slab to achieve a single integral unit for said second structural member while leaving a second remnant slab with a third free peripheral edge.   
     
     
       8. The method as defined in claim 7, further comprising: forming a third structural member of a third size from said second remnant slab at said third free peripheral edge; and   severing said third structural member from said second remnant slab to achieve a single integral unit for said third structural member.